Hearthstone is preparing to travel extraordinarily far back into Warcraft history. Reign of the Black Empire, a newly revealed expansion centered on the Old Gods, is scheduled to arrive on October 20. Alongside that set, players can expect a new card keyword, a Battlegrounds minion type, and a free Journal addition intended to gather story and game-event material in one place.

The bigger long-range piece of the plan is a new playable class. Monk is planned for March 2027, which would make it Hearthstone’s first newly added class in four years. Specific mechanical details about Monk have not yet been shared, with more information set to be teased in later convention panels.

It is a substantial pair of announcements: one focuses on a near-term expansion with several defined systems, while the other signals a broader change to the game’s class lineup next spring. For a game built around the distinct identities, card pools, and deck-building possibilities of its classes, even confirmation of an incoming Monk is meaningful before a single class card has been detailed.

Reign of the Black Empire heads into Warcraft’s distant past

Reign of the Black Empire draws from the era tens of thousands of years before the present-day Warcraft setting. Its stated backdrop is the conflict between the Old Gods and the Titans, two vast forces whose struggle sits deep in Azeroth’s mythology. That historical framing gives the expansion an appropriately enormous canvas: this is not simply another faction dispute or regional skirmish, but a period tied to the shape of the world itself.

The expansion also appears connected to the ongoing main narrative in World of Warcraft. Exactly how that connection will work, or which events and characters may bridge the two games, remains unspecified. Still, the shared thematic direction makes the timing notable for players who follow Warcraft across formats. The broader universe has often supplied Hearthstone with settings, creatures, and character ideas, and the Old Gods offer no shortage of dramatic material for a card game built on large effects and unusual combinations.

For readers keeping track of the wider Warcraft roadmap, the setting sits alongside other forward-looking plans for Azeroth, including recent discussion of World of Warcraft’s path toward The Last Titan. Reign of the Black Empire’s precise narrative role has not been laid out, but its Old God-versus-Titan premise clearly occupies familiar territory in that larger mythos.

Assemble combines the text of two minions

The central newly announced Hearthstone keyword is Assemble. Its defining function is to merge the text boxes of two separate minions. That wording matters. Rather than merely granting a one-off bonus or creating a predetermined combined card, Assemble is presented as a way to bring together the rules text from two different minions.

There are no confirmed examples of particular Assemble pairings yet, so the full practical limits of the mechanic are unknown. It is not clear from the initial description how players will select or generate the minions involved, whether there are restrictions on eligible text, or how all interactions will be presented in play. Those are details that will be important once the expansion’s cards begin to be shown.

Even with those caveats, the basic idea points toward a mechanic with a potentially wide range of outcomes. Hearthstone minion text can include battlecries, deathrattles, passive effects, conditional stat gains, summoning instructions, and other abilities. Putting two text boxes together could make card evaluation especially dependent on context: a modest effect might become much more valuable when joined to a complementary one, while other pairings may be awkward, expensive, or strategically irrelevant.

That uncertainty is part of the appeal. Assemble suggests an expansion designed to invite experimentation, unusual board states, and combinations that may not be obvious at first glance. It also makes it sensible to wait for the complete card reveal before declaring which decks or archetypes will benefit most. The mechanic has been named and broadly explained, but the surrounding card environment is still to come.

Apparitions give Battlegrounds an Old God awakening track

Reign of the Black Empire will also affect Battlegrounds, Hearthstone’s separate auto-battler mode. The addition there is a new minion type called Apparitions. Each time one of a player’s Apparitions is destroyed, that player moves closer to awakening a powerful Old God that can fight on their behalf.

The announcement establishes the basic loop: Apparitions die, progress accumulates, and an Old God eventually joins the fight. It does not yet establish which Old Gods can appear, what their combat capabilities will be, how much progress is needed, or how Apparition access will be distributed among heroes and compositions. Those unanswered questions leave plenty of room for the eventual details to determine the mechanic’s real strategic weight.

At a high level, the system gives destruction a clearer payoff than simple attrition. In Battlegrounds, minions being removed in combat is already a constant; Apparitions turn that loss into a visible path toward a later power spike. That can create a distinct decision-making tension. A player may value the new type for its eventual awakening reward, but must still build a board capable of surviving long enough for that reward to matter.

The Old God theme also fits the mode’s tendency toward escalating spectacle. Battlegrounds has room for mechanics that build over a combat or across multiple rounds, and the promise of a major summoned combatant is naturally attention-grabbing. Whether Apparitions become a broadly useful minion family or a more situational strategy will depend on the cards and systems still unrevealed.

The Journey will become a free Journal hub

Not every Reign of the Black Empire addition is a card or combat mechanic. On October 20, all players will receive The Journey, a new section of the Journal. It is intended to operate as a home and hub for game events, narrative events, stories, and new modes.

The Journey’s arrival is explicitly free, separate from any question of expansion cards or other content. Its proposed role is organizational as much as thematic: a single destination for players looking for what is happening across Hearthstone’s events, stories, and modes. The specific layout, the first activities it will contain, and how regularly it may be updated have not been detailed.

That uncertainty does not lessen the significance of the direction. Hearthstone contains several ways to play and frequently rotates through events and themed content. A dedicated hub could make those pieces easier to find and give narrative material a more defined home. The name also suits an expansion rooted in ancient Warcraft history, positioning the game’s ongoing activities as parts of a continuing route rather than isolated menu items.

Monk is scheduled to arrive in March 2027

The Monk announcement is intentionally light on specifics, but the date and milestone are clear. The class is due in March 2027, and it will be the first new Hearthstone class in four years. No card designs, hero details, class keyword, deck-building rules, or gameplay identity were confirmed in the initial reveal.

That means speculation should remain just that. Monk has an established place in Warcraft, but no assumption about how its themes will translate into Hearthstone should be treated as confirmed. The eventual class could draw from familiar fantasy concepts associated with monks, yet its precise mechanics and visual presentation have not been announced.

What is certain is that a class addition is different from an ordinary expansion feature. Classes influence long-term deck construction, future card design, and the overall balance of the game’s class ecosystem. A March release also gives the team time to introduce information in stages rather than trying to explain a major addition all at once. More Monk teasers are expected during later convention programming, but players will need to wait for those presentations for the first firm details.

What is confirmed, and what remains to be shown

  • October 20: Reign of the Black Empire is scheduled to launch.
  • Expansion setting: The story is set tens of thousands of years in Warcraft’s past and concerns the Old Gods’ conflict with the Titans.
  • New keyword: Assemble merges the text boxes of two separate minions.
  • Battlegrounds: Apparitions are a new minion type; their destruction advances progress toward awakening a powerful Old God.
  • Free addition: The Journey will be added to the Journal as a hub for game and narrative events, stories, and new modes.
  • March 2027: Monk is planned as Hearthstone’s first new class in four years.

The most important unknowns are equally straightforward: the cards surrounding Assemble, the operating rules and power level of Apparitions, the contents of The Journey, and virtually all gameplay specifics for Monk. Reign of the Black Empire has a defined release date and an unusually expansive premise, while Monk gives Hearthstone players a major reason to watch for further reveals well beyond the October expansion launch.